Yarn guide means for bobbin change mechanisms



July 13, 1965 w. GROB 3,194,278

YARN GUIDE MEANS FOR BOBBIN CHANGE MECHANISMS Filed Feb. 18, 1965 2Sheets-Sheet '1 Jul 13, 1965 w. GROB 3,194,278

YARN GUIDE MEANS FOR BOBBIN CHANGE MECHANISMS Filed Feb. 18, l963 Fig. 5

2 Sheets-Sheet 2 I2 r-"" m 4 3 i 35 A 96 L +11! Fi .7 g 25 INVENTOR 9 4BY! I 1% ATTORNEY United. States Patent 3,194,278 YARN GUlDE MEANS FORBOBBIN (IHANGE MECHANISMS Wiliy Groh, Langgrutstrasse 112, Zurich,Switzerland Filed Feb. 18, 1963, Ser. No. 259,047

Claims priority, application Switzerland, Feb. 19, 1962,

4- Claims. (Cl. 139-247) The invention relates to an automatic loom andmore particularly to a mechanism for such looms with a pivoted sley anda plurality of pirns adapted to be inserted selectively into a shuttle.

It is a first object of the invention to provide means contributing towind the pirns on the machine itself.

A further obejct of the invention is the provision of means so that theweft yarns come undoubtedly into a position beneath the tongue of theshuttle after pirn change. I

It is another object of the present invention to provide meansfacilitating an efficacious structure for changing the pirns on anautomatic loom, which structure is relatively simple, has a few movingparts and is extremely accurate in its operation, without necessitatingthe use of expensive and complicated control means.

These and other features, capabilities and advantages of the inventionwill appear from the following detailed description of one embodiment,illustrated in the accompanying drawings.

FIG. 1 shows a side view of the device with several pirns,

FIG. 2 is a plan view of the device shown in FIG. 1,

FIG. 3 is a diagrammatic view of the device during the pirn change,

FIG. 4 shows diagrammatically a further view of the device in anotherposition of the sley,

FIG. 5 is a view of the various positions of the crank shaft for drivingthe sley,

FIG. 6 is a front view of a part of a shuttle with an inserted pirn, and

FIG. 7 is a cross-section through the shuttle on the line VlI--Vil ofFIG. 6.

The device is intended for a loom with automatic pirn or bobbin changein which the wound pirns 2 are supplied one over the other in a shuttlebox 1. The empty pirns are wound with yarn on the machine itself. Thiswinding mechanism is no part of the invention and therefore it is not infurther details explained. The lowermost pirn i 2 in this mechanismwhich is not inside of a shuttle is determined by shuttle box 1 andother mechanisms and cannot be varied to a substantial extent.

The lowermost pirn 3 of the full wound pirns 2 stored in the shuttle box1 lies directly over the shuttle 4 when the sley 243 of the loom lies inits foremost position shown in FIG. 3. The foremost position of the sleycorresponds to the position I of the crank (see FIG. 5).

For pirn change a striker 6 acts directly over the lowermost pirn 3disposed above the shuttle and forces it into the inside of the shuttle4 (FIG. 3) whereby simultaneously the empty pirn '7 falls downwardly.The yarn ends or yarn tails 9 projecting from the pirns Z are heldconstantly taut but not pulled out by the rotating felt drum 8.

At the moment of pirn change the shuttle 4 is in the position 1 (FIG. 2)and the yarn ha drawn from the pirn 3 thus runs in the axial directionof the pirn towards the 3,1?42'78 Patented Juiy 13, 1965 drum 8. Thepick for effecting the movement of the shuttle and thus its traverseacross the loom is however effected at a somewhat later moment, that isin fact when the crank rod has already reached the position 11 (FIG. 5)and thus the shuttle has reached the somewhat displaced position II(FIG. 2).

In order that the yarns 9 shall not adopt the inclined position 9b shownin chain lines in FIGS. 2 and 6, in which threading in the slot of theshuttle 4 would be made diflicult or impossible, an adjusting yarn guidemember 14 is provided which ensures that the yarn end 9 is at leastapproximately coincident with the axis of the pirn 3 also in theposition II of the crank arm 35 or Ii of the shuttle 4, that is to sayit runs in line with the longitudinal axis of the shuttle. By thisdisplacement of the yarn between the shuttle 4 and the drum 8 thethreading procedure can proceed regularly. The yarns can now pass intheir normal position into the yarn receiving means of the shuttle,under the tongue 25 and between the brake jaws 36 (see FIG. 7) as aresult of the increased pull on the yarn 9 by the striking movement ofthe shuttle. The increased pull on the yarn 9 has the effect that theyarn slips over the upper inclined part of the tongue 35 and is pushedunder this tongue.

The brake jaws 36 disposed between the tongue 25 and the pirn aremovable and bear yieldingly against the yarns 9c.

The adjusting yarn guide member 14 consisting preferably of bent stripmaterial is provided with a shoulder 37 against which the lowermost yarn9 of the pile of pirns bears. A rod 15 connected with an angle member 39to the adjusting member 14 is supported in an axially displaceaolemanner in two bearings 16 for clamping the yarn in the moment of thestriking movement of the shuttle between clamping heads 15a, 15b. Alever 17 1s pivoted to the rod 15 between the two bearings 16 on which apull is exerted by a spring 18 approximately in the direction towardsthe crank shaft. A blocking pin 19 engaging behind a projection 20 ornose of the lever 17 prevents this lever initially from moving to theposition shown in chain lines in FIG. 4. When pirn change is requiredthe pin 19 is shifted upwardly by an intermediate member of the loom,not shown in the drawing, thereby the lever 17 is released and is movedunder the action of the spring 18 into the position shown in FIG. 4 inchain lines. Thereby it guides the rod 15 and thus the adjusting member14 together with the yarn 9 in the direction of the arrow B (FIG. 4).Thereby the yarn 9c adopts the position shown in FIG. 2 for the positionII until the shuttle 4 has reached the other side of the loom and thecrank shaft 35 has rotated through the position 1H.

Thereafter the adjusting yarn guide member 1 1 is moved back again toits original position. For this purpose a return lever 21 is pivotallyfastened to the rod 15 is pushed into the path of an angular stop 22,rigidly fastened to the sley 23. On the return movement of the sley 23in the direction of the arrow F as a result of the further movement ofthe crank shaft through position iii, the return lever 21, the rod 15and the adjusting member 14 are pressed back to the original positionshown in full lines in FIG. 4 whereupon the pin 19 again drops behindthe projection 29 in order to retain the lever 17 until the next pirnchange is required.

Various changes and modifications may be made without departing from thespirit and scope of the present invention and it is intended that suchobvious changes and modifications be embraced by the annexed claims.

What I claim is:

1. A yarn guiding device for a loom, comprising, in combination, areciprocable sley; a shuttle movable with said sley between a firstposition for receiving a pirn and a second position disposed to bepicked, said shuttle having yarn receiving means located in alongitudinal axis thereof; meansfor inserting a pirnhavin'g a yarn tailinto saidshuttle in said first position; retaining means for. Vretaining the yarn tail of the inserted pirn spaced fromsaidshuttleliand'being disposed in relation to said first position ofsaid shuttle so that the yarn tail1extends in V "the direction of saidlongitudinal axis in-said first posi 'tion'of said shuttle, and atanangle" t-o said axis in said T a :second position of said shuttle; yarnguide means lo.-

tained yarnttail to a position alignedwith sa-idfllongitudinalaxis ofsaid shuttle in said second position, open atingmeans for moving saidyarn guide means to said been moved to said second position thereof sothat the second position thereof after said shuttle with a pirn' has 7yarn tail: is aligned with said shuttle at the start of'the' pickingmotion and :adapted to be inserted into said yarn receiving means;*andmeans connected With said yarn guide means andcontr-olled by said 'sleyformoving said yarn guide means back to said first position. v

i directionJof the' rnovement of said slev foriengaging the;

yarn tail, said clampin-gmeans clarriping the yarn tail in apositionalignediwith ithe longitudinal-axis of said shuttle, andsaidyarn guidei means moy ing a portionpf the yarn tail between saidclamping ;mjeanst andisaid shuttle Y to' a .p o'sition aligned with saidlongitudinalxaxis of said I shuttlein said second position wherebytheyarn tail is placed in a position to be inserted intosaid yarn receivingmeans of said shuttleyandi operating means connected to said yarnfguide-meansyand including a spring-.;connected, V to said yarn guidemeans for moving'the sametoengage i and move' the yarn tail 'tosaid ;aligne dnposition,' and 1a blocking means for holding said yarn,.guidefmeans and adapted to release said yarniguideimeans ihsynchronism:

With'the 'rnovementof'said sley. for; movement by said spring; 'andmeans.operatedlby said sley;v for moving said I yarn guide means against theaction ofass'aid'ispring .until? j J 7 said blocking'mreans:engages,saidiyarn'guide means and block movement of the same:

a second position disposedto bepicked ,-said shuttle'hav- 2.;A yarnguiding device for a loom, comprlsing, in I combinationga reciproeable'sley; a shuttle movable with said sley between a first positionforreceiving a pirn' and a second position disposed to be picked, saidshuttle having yarn receiving means located in a longitudinal axisthere- 'the yarn tail of the inserted pirn spaced frornsaid shuttleandvbeing disposed in relation to said' first position 'of said shuttleso that the yarn tail extends in the direction of p of; means forinserting a pirn having a yarn tail into said shuttle in said firstposition; holding, means for holding said longitudinal axis in said;first position of said shuttle, H g

and at an angle to said axis insaid second position ofsaid shuttle; anda device including clamping means and a yarn guide means locatedintermediate said shuttle" and? I said' holding means and beingmoveablein the direction of the movement of said sleyt for engaging theyarntail, said clamping means clamping the yarn tail in a positionaligned with the lo'ngitudinalaxis of said shuttleyand said yarn guidemeans moving a portion of the yarn tail between said clamping means andsaid shuttle to a posi-' tion aligned with said longitudinal axis. ofsaid shuttle in said second position whereby the yarn tail is placed ina position to be inserted into'said yarn receiving means A of saidshutle. 7

3. A yarn guiding device for a loom,cornprising, in

combination, a reciprocable sley; ashuttle movable'with said sleybetweena first position for receiving a pirn and i -asecond position disposedto he picked, said shuttle hav- 0 ing yarn receiving means located in alongitudinal axis thereof; means for inserting a pirn having a yarn-tailinto a said shuttle in said firstposition; holding means for holding the'ya rnv'tail of the inserted pirn' spaced from said" shuttle and beingdisposed in relationto saidi first position of said shuttle so that theyarn tail extends in the, direction of'said longitudinal axis in saidfirst positionof said shuttle, and at an angle to said axis in saidsecond 7 position of said shuttle; and a device including clampingmeans'and yarn-guide means located intermediate said sh Httle and saidholding means and being movablein the 2,766,779,. 1-0/56' Goodhue et a ling yarn'rec eiving m eans-"locatdinj along'itudin-alaxis Qthereof;means: for'inseiiting' a pirn'having ayarnitail into said shuttle in,saidfirstposition; holding means for hold-i ing the yarn tail ofitheinsertedipirnsispacedgfrom. said shuttle'yand beingdisposediinirelation to saidtfirst' posi tion of, said shuttle so 'thatgthe;yarndailrextendsin the 1 direction of r saida longitudinal c axis insaid i first position I of' said shuttleg and ,at' an angle ito:saidaxis iinisaid sec-. 'i ondposition of said shuttle; and adeviceiincluding clamp-. 1 a ing means and yarn guide means locatedintermediate I said: shuttle ands'aid iholding )means; and being movablein the direction of the rnovement of saidsley for engagi ing'the yarntail; sa'idiclanipirig mean-s clamping'theyardtailfin" a position:aligned-"Wit-hxthe longitudinal axis of said shuttle,; and saidyarn"guidemeans moving-a ipor- 5 tion of; the 1y-arn-ftail betWeen'said jcla-rn-pinggmeans and said shuttle to a position'ali-gned with saidlongitudinal *axispf' said shuttlejin said 'second position whereby. theE yarn tailis placed in a positionto the- 'in'sertedzinto said yarnreceivingwmeans ofsaid shuttle; and operating means including "a. levericonnected to said yarn guidefmeans: and to said clamping meansQaspring"eonnectedtosaid lever for moving 'saidyarn "guide meansfto'engage's'ai'di yarn-tailjso-that the same, is moved to said" alignedposition, and for operating saidclamping mean'stto; clamp" the yarntail, and blocking meansifor blocking movement of 'said lever underthetaction of saidspring; andlefi iptedto -v releasewsaid lever insynchronisrn- With itheimovement of said 'sleyg. and a' member connectedivith said lever; and t operated bysaid sle'yduring movement with'saidshuttle to 'said *first position forxmoving said lever against theaction of said-spring until s'aidblockingmeans engages j Refer nces onesby gnsn aminem NlIE A E AT NT 1,16 66 *11/ 1'5 -1*Wh'ittaker et'-a'l'.;.

DONALDW" A K iPfimary I E d i 1 I e 4; TA ryarn guiding device for atl-ooingcomprising, in combination; a 'reciprocablei sley; a shuttlemovable with 7 said sley :bet'weehafitst position gf or. receivingapirnsand V

1. A YARN GUIDING DEVICE FOR A LOOM, COMPRISING, IN COMBINATION, ARECIPROCABLE SLEY; A SHUTTLE MOVABLE WITH SAID SLEY BETWEEN A FIRSTPOSITION FOR RECEIVING A PIRN AND A SECOND POSITION DISPOSED TO BEPICKED,S AID SHUTTLE HAVING YRN RECEIVING MEANS LOCATED IN ALONGITUDINAL AXIS THEREOF; MEANS FOR INSERTING A PIRN HAVING A YARN TAILINTO SAID SHUTTLE IN SAID FIRST POSITION; RETAINING MEANS FOR RETAININGTHE YARN TAIL OF THE INSERTED PIRN SPACED FROM SAID SHUTTLE AND BEINGDISPOSED IN RELATION TO SAID FIRST POSITION OF SAID SHUTTLE SO THAT THEYARN TAIL EXTENDS IN THE DIRECTION OF SAID LONGITUDINAL AXIS IN SAIDFIRST POSITION OF SAID SHUTTLE, AT AN ANGLE TO SAID AXIS IN SAID SECONDPOSITION OF SAID SHUTTLE; YARN GUIDE MEANS LOCATED INTERMEDIATE SAIDSHUTTLE AND SAID RETAINING MEANS AND BEING MOVABLE IN THE DIRECTION OFTHE MOVEMENT OF SAID SLEY BETWEEN A FIRST POSITION ALIGNED WITH SAIDSHUTTLE IN SAID FIRST POSITION AND A SECOND POSITION ALIGNED WITH SAIDSHUTTLE IN SAID SECOND POSITION FOR SLIDINGLY ENGAGING THE YARN TAIL ANDFOR MOVING THE ENGAGED AND RETAINED YARN TAIL TO A POSITION ALIGNED WITHSAID LONGITUDINAL AXIS F SAID SHUTTLE IN SAID SECOND POSITION, OPERATINGMEANS FOR MOVING SAID YARN GUIDE MEANS TO SAID SECOND POSITION THEREOFAFTER SAID SHUTTLE WITH A PIRN HAS BEEN MOVED TO SAID SECOND POSITIONTHEREOF SO THAT THE YARN TAIL IS ALIGNED WITH SAID SHUTTLE AT THE STARTOF THE PICKING MOTION AND ADAPTED TO BE INSERTED INTO SAID YARNRECEIVING MEANS; AND MEANS CONNECTED WITH SAID YARN GUIDE MEANS ANDCONTROLLED BY SAID SLEY FOR MOVING SAID YARN GUIDE MEANS BACK TO SAIDFIRST POSITION.